Optimize ternary condition return

Commit migrated from https://github.com/dotnet/corefx/commit/3236ea8581190d675fcbc141e356a0321851b0b0

src/libraries/System.Text.RegularExpressions/src/System/Text/RegularExpressions/Regex.cs

@@ -1021,7 +1021,7 @@ internal CachedCodeEntryKey(RegexOptions options, string cultureKey, string patt
 
         public override bool Equals(object obj)
         {
-            return obj is CachedCodeEntryKey ? Equals((CachedCodeEntryKey)obj) : false;
+            return obj is CachedCodeEntryKey && Equals((CachedCodeEntryKey)obj);
         }
 
         public bool Equals(CachedCodeEntryKey other)